Pumping apparatus



G. C. ENGSTRAND PUMPING APPARATUS Filed- Nov. 11 1924 IIIHHIIII kWh 5555ZZ 1 I im, KWW/ awwentoz Patented Sept. w, 1925..

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F BROOKLYN, "NEW YORK, ASSIGNOR T0 01L PUMPING &

PUMPING APPARATUS.

a lication filed November 11, 1924; serial 1%. 749,195.

To all whom it may concern:

Be it known that l, German (3. ENG- -\s'rRAND, a subject of the King ofSweden, residing at Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Improvements 1n PumpingApparatus, of which the following is a specification.

My invention relates to a pumping apparatus and method for thewithdrawal of fuel oil and residuefrom the tanks of a vessel.

This liquid material is viscous, sticky and in cold weather almostjelly-like, and due to its nature it cannot be pumped either in a solidcolumn or in an aerated one.

lln order to pump such been found necessary to transmit it by means ofan air stream in a broken up condition through the transmission hose.Such an arrangement requires. spacious vacuum tanks and large capacitvacuum pumps. 1 have discovered that y means of doing away with thespacious vacuum receptacles hitherto used and connecting the vacuum pumpor exhauste'r tothe transmission line by means of a Joy-pass, I am ableto reduce the required capacity of vacuum pump to about one fifth of thesize required when receptacles are used.

I have also discovered that by so arranging the transmission line thatthedischarge end of the transmission forms an air sealed leg I am ableto make the bypass connect1on at a point above the height to whlch avacuum can lift liquids like oil and water. By this arrangement it ispossible to deviate practically all the air into the by-pass of theexhauster while the g by its momentum carried past the by-pass andforcibly ejected against the atmospheric pressure, into the receivingbarge.

In the drawing 3- I drawing in which like material it has "severalopenin s pumped material is Figure 1 shows the general pumpingardesignate correspond the registering openings 17 and 19.-

- A flexible hose 3 is shown connecting the ship tank with the receivingbarge and this hose transmission line has a lateral by-pass line 4 atthe end of which the steam exhauster 5 is attached.

The lateral by-pass connection is made by means of a Y 6 so placed thatthe entrained liquid material will separate from the air assisted bygravity.

The steam ejector 5 comprises a steam pipe nozzle 7 which is directedinto a properly designed throat piece 8 to which the air inlet 9 leads.

The steam ejector is shown supplied with legs 10 adapted for horizontalmounting.

The intake end of the transmission line 3 is supplied with a nozzle 11having the upper part 12 of the same diameter as the line and a lowerrestricted neck part .13 to be inserted in the material to be pumped.

The upper part 12 is provided with a steam air blower 14 comprising incombination the air conductor 15 inside which the steam pipe nozzle 16ends.

The air conductor 15 is provided with 17 and a turntable sleeve 18 isprovide with an equal number of registering openings 19-, thuspermitting a perfect air control.

Acap 20 closes'the outside end of the air conductor 15 to pipe nozzle 16is welded. 1

The drawing shows [the steam blower welded to the intake nozzle 11.

The discharge end of the transmission line is shown submerged in theliquid mate rial in the barge.

Proper steam hoses 21 are connected to the steam exhauster 5 as well asthe steam air blower 14 and are conveniently hooked up to thesteamsupplycithe r on the vessel or on the barge.

The method of procedure is as follows:

Steam being a dm1tted to the steam air transmission line 3 and theliquid in the barge will rise in the outboard leg a correspondingheight.

Care must e taken that the Y 6' is placed so hi h 'that'the liquidcolumn in the air not at any time reach the bypass line 4:.

Steam is also admitted to the blower 14: and atmospheric air is suckedin through which cap the steam exhauster 5, a suction, is created in theseale discharge leg of the transmission will,

The nozzle neck 13' is now inserted into the liquid material, whereuponthe liquid is sucked up into the hose forming a more or less aeratedliquid column into which the steam condensesafter having injected theair therein.

With the intake end sealed in this manner a vacuum is being built up inthe transmission line more quickl resistance of the ascen ing column,which resistance is in direct proportion to the height of the column.

. A vacuum will soon be reached at which the ascending column will partat the air admittance, and this aerated column part will be propelled bythe air and steam filling in behind and the aerating bubbles will, inexpanding, break up the column more or less into a gush rushing throughthe hose. It is to be noted that the main of the air is not confinedinside the gush, but passes by and around the gush during its passagethrough the hose. Due to this condit-ion the air is readily separatedfrom the gush and sucked into the aspirator line 4, while the gush dueto the momentum, which the passing air stream has imparted, will notonly rush past the lateral by-pass inlet but *also forcibly strike anddepress the sealing liquid column in thedischarge end of thetransmission hose which discharges into the receiving barge.

It is also to be noted in this connection that the nozzle neck 13 shallnot be too deeply inserted into the liquid material as ithas been foundthat the amount of air which passes through the registering openings 17and 19 is inadequate to fill in behind the gushes. Therefore, the extraamount of. air needed at this instant will have to be admitted throughthe intake end proper.

It is also to be noted that the amount of air admitted to .the line atthis instant is much larger than the amount of air which the airexhauster is able to suck out and the vacuum is accordingly reduced inthe transmission hose. With the vacuum lowered another aerated columngets a chance to form at the intake end whereupon the operation isautomatically repeate I claim 1. In a vacuum pumping apparatus, atransmission line comprising a suction leg and a discharge leg connectedso as to form a continuous. transmission, said discharge leg having ahermetically sealed discharge end, a steam operated air exhausterbypassed from said discharge leg at a plane substantially above thelevel to which the than the frictional liquid material may be caused toascend in said discharge leg when acted upon by the vacuum necessary forthe transmission.

2. In a vacuum pumping apparatus, a transmission line comprising asuction leg and a discharge leg connected so 'as to form a continuoustransmission, said discharge leg having a hermetically sealed dischargeend an air exhauster by-passed from said discharge leg at a pointsubstantially above the leve to which the liquid material may be causedto ascend in said discharge leg when acted upon by the vacuum necessaryfor the transmission. 7

3. An air transmission line for liquids comprising a suction leg and adischarge leg aligned so as to form a continuous transmission and havinga by-passed steam exhauster creating an air current therein, and meansfor preventing the liquid material from entering and passing through thesteam exhauster. I

4. In a vacuum pumping apparatus, a transmission line substantiallyU-shaped comprising a suctionleg and a discharge leg aligned so as toform a continuous transmission, said discharge leg having a hermeticallysealed discharge end, a steam operated air exhauster by-passed from saiddischarge leg at a plane substantially above the level to which theliquid material may be caused to ascend in said discharge leg when actedupon by the vacuum necessary for the transmission.

5. In a vacuum pumping apparatus, a

transmissionline substantially U-shaped comprising a suction leg and adischarge leg alined so as to form a continuous transmission, saiddischarge leg having a hermetically sea-led discharge end, an airexhauster by-passed from said discharge leg at a point'substantiallyabove the level to which the liquid material may be caused to ascend insaid discharge leg when acted upon by the vacuum necessary for thetransmission. v

6. In a vacuum pumping apparatus, a transmission line comprising asuction leg and a discharge leg alined so as to form a continuoustransmission, saiddischarge le having a hermetically sealed discharge enan air exhauster by-passed from said discharge leg at a pointsubstantially above-the level to. which the liquid material may becaused to ascend in said discharge leg when. acted upon by the vacuumnecessary for the transmission.

GUNNAR e. ENGSTRAN'D.

